From Viscosity VPN:
Viscosity is an OpenVPN client for Mac, providing a rich Cocoa graphical user interface for creating, editing, and controlling VPN connections. Viscosity provides a complete OpenVPN solution for Leopard (Mac OS 10.5) and does not require any additional downloads or software. Viscosity allows connections to be completely configured through a GUI, without any need to know how to use the command-line or OpenVPN's configuration file syntax. Advanced users still have full manual control over configuration options if desired. As well as connection configuration, Viscosity also provides a global menu for quick connection/disconnection, as well as a details window containing connection information and traffic statistics.
What's new in this version:
OpenVPN updated to version 2.3.13
OpenSSL updated to version 1.0.2j
Workaround for a potential hang if an ifconfig process is stuck
Various bug fixes and enhancements